Help for a game

Hi, I am a computer science student. On the wave of Blizzard's Hearthstone I started writing a small game of card just for fun. I implemented the protocol, the persistence layer, the data objects, the client and the server and I also started implementing the user interface.
I am looking for a 2D artist that is willing to help me in this project, which I repeat is completely for fun (no money, no deadlines, no obbligation, no fixed workload). I'll be taking assets from around the web and need only a few of them that I cannot find (like card frames or custom buttons).